Sure the Geo Rescue Mace Windu looks lame, but unlike all the other figures, his "slashing lightsaber action" is actually fun to play with IMO. I set up Final Duel Jango Fett on his knees, reared back Mace's swinging arm, and sent Jango's head flying across the room tennis-backhand style quite a few times now. I guess that's how the infamous moment goes down in the movie. Then Mace went totally ballistic, attacking Hanger Duel Anakin and Bespin Luke. I'm sure you know the results.
Speaking of Bespin Luke, as much as I love this figure, his slashing action is worst out of the lot. It's more of a "quickly look to your left" action. The kids will love that one.